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Full text of "Analytical Mechanics"

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Ib. = pound, the unit of weight.      gm. = gram,
pd. = mass   of   a  body which       kg. = kilogram.
weighs one pound.            mm. = millimeter,
in. = inch.                                    cm. = centimeter, ft. = foot.                           .            m. = meter.
H.P. = horse power.                         km. = kilometer. S.H.M. = simple harmonic motion.
Letters in gothic type denote vector magnitudes.
A dot on a letter indicates that the latter is differentiated with respect to time.
A letter with a bar above it denotes an average magnitude.
The letter " i" when used as a subscript denotes " any one of ... ,"' thus "Fi" stands for "any one of Fit F^ Fs, etc,"